#include <fstream>
#define ll long long
using namespace std;
ifstream f("inversmodular.in");
ofstream g("inversmodular.out");
int a,n,inv;
ll putere(ll x,ll y)
{
    ll t;
    if(y==0)return 1;
    if(y==1)return x;
    t=putere(x,y/2);
    if(y%2==0)return (t*t)%n;
    if(y%2==1) return (x*t*t)%n;

}
int main()
{
    f>>a>>n;
    inv=putere(a,n-2)%n;
    g<<inv;
    return 0;
}